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300-410 Practice Question: The default BGP update timer (advertisement…
What is the default BGP update timer (advertisement interval) for eBGP peers in Cisco IOS-XE?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
30 seconds
The default eBGP advertisement interval is 30 seconds, meaning that after sending an update to an eBGP peer, the router waits at least 30 seconds before sending another update.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
0 seconds
Why it's wrong here
Zero seconds is incorrect for the default eBGP advertisement interval in Cisco IOS-XE, which is 30 seconds. This option is tempting because 0 seconds is the default update timer for iBGP peers. iBGP peers send updates immediately upon route changes, whereas eBGP peers typically coalesce updates to reduce overhead, hence the 30-second interval. Therefore, 0 seconds would be the correct choice if the question concerned iBGP peers.
- ✗
15 seconds
Why it's wrong here
15 seconds is the default for iBGP, not eBGP.
- ✓
30 seconds
Why this is correct
Correct. The default eBGP advertisement interval is 30 seconds.
- ✗
60 seconds
Why it's wrong here
60 seconds is not the default for eBGP; it is the keepalive timer.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 300-410 exam.